What they determined after further tests, however, was that she had multiple sclerosis, an autoimmune disease that
affects the brain and
central nervous system and was causing optic neuritis, an inflammation of the optic nerve that can cause a partial or complete loss of
vision.
The term macular degeneration refers to a group of disorders that
affect the
central portion of the retina and, as a result, the center of the field of
vision.